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[apple/syslog.git] / libsystem_asl.tproj / src / asl_util.c
diff --git a/libsystem_asl.tproj/src/asl_util.c b/libsystem_asl.tproj/src/asl_util.c
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+/*
+ * Copyright (c) 2006-2011 Apple Inc.  All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License."
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <Block.h>
+#include <dispatch/dispatch.h>
+#include <os/assumes.h>
+#include <xpc/xpc.h>
+#include <asl_private.h>
+
+static uint8_t *b64charset = (uint8_t *)"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+static int
+asl_is_utf8_char(const unsigned char *p, int *state, int *ctype)
+{
+       switch (*state)
+       {
+               case 0:
+               {
+                       *ctype = 0;
+
+                       if (*p >= 0x80)
+                       {
+                               *state = 1;
+                               if ((*p >= 0xc2) && (*p <= 0xdf)) *ctype = 1;
+                               else if (*p == 0xe0) *ctype = 2;
+                               else if ((*p >= 0xe1) && (*p <= 0xef)) *ctype = 3;
+                               else if (*p == 0xf0) *ctype = 4;
+                               else if ((*p >= 0xf1) && (*p <= 0xf3)) *ctype = 5;
+                               else if (*p == 0xf4) *ctype = 6;
+                               else return 0;
+                       }
+
+                       break;
+               }
+
+               case 1:
+               {
+                       switch (*ctype)
+                       {
+                               case 1:
+                               {
+                                       if ((*p >= 0x80) && (*p <= 0xbf)) *state = 0;
+                                       else return 0;
+                                       break;
+                               }
+
+                               case 2:
+                               {
+                                       if ((*p >= 0xa0) && (*p <= 0xbf)) *state = 2;
+                                       else return 0;
+                                       break;
+                               }
+
+                               case 3:
+                               {
+                                       if ((*p >= 0x80) && (*p <= 0xbf)) *state = 2;
+                                       else return 0;
+                                       break;
+                               }
+
+                               case 4:
+                               {
+                                       if ((*p >= 0x90) && (*p <= 0xbf)) *state = 2;
+                                       else return 0;
+                                       break;
+                               }
+
+                               case 5:
+                               {
+                                       if ((*p >= 0x80) && (*p <= 0xbf)) *state = 2;
+                                       else return 0;
+                                       break;
+                               }
+
+                               case 6:
+                               {
+                                       if ((*p >= 0x80) && (*p <= 0x8f)) *state = 2;
+                                       else return 0;
+                                       break;
+                               }
+
+                               default: return 0;
+                       }
+
+                       break;
+               }
+
+               case 2:
+               {
+                       if ((*ctype >= 2) && (*ctype <= 3))
+                       {
+                               if ((*p >= 0x80) && (*p <= 0xbf)) *state = 0;
+                               else return 0;
+                       }
+                       else if ((*ctype >= 4) && (*ctype <= 6))
+                       {
+                               if ((*p >= 0x80) && (*p <= 0xbf)) *state = 3;
+                               else return 0;
+                       }
+                       else
+                       {
+                               return 0;
+                       }
+
+                       break;
+               }
+
+               case 3:
+               {
+                       if ((*ctype >= 4) && (*ctype <= 6))
+                       {
+                               if ((*p >= 0x80) && (*p <= 0xbf)) *state = 0;
+                               else return 0;
+                       }
+                       else
+                       {
+                               return 0;
+                       }
+
+                       break;
+               }
+
+               default: return 0;
+       }
+
+       return 1;
+}
+
+__private_extern__ int
+asl_is_utf8(const char *str)
+{
+       const unsigned char *p;
+       int flag = 1;
+       int state = 0;
+       int ctype = 0;
+
+       if (str == NULL) return flag;
+
+       for (p = (const unsigned char *)str; (*p != '\0') && (flag == 1); p++)
+       {
+               flag = asl_is_utf8_char(p, &state, &ctype);
+       }
+
+       return flag;
+}
+
+__private_extern__ uint8_t *
+asl_b64_encode(const uint8_t *buf, size_t len)
+{
+       uint8_t *out;
+       uint8_t b;
+       size_t i0, i1, i2, j, outlen;
+       
+       if (buf == NULL) return NULL;
+       if (len == 0) return NULL;
+       
+       outlen = ((len + 2) / 3) * 4;
+       out = (uint8_t *)malloc(outlen + 1);
+       if (out == NULL)
+       {
+               errno = ENOMEM;
+               return NULL;
+       }
+       
+       out[outlen] = 0;
+       
+       i0 = 0;
+       i1 = 1;
+       i2 = 2;
+       j = 0;
+       
+       while (i2 < len)
+       {
+               b = buf[i0] >> 2;
+               out[j++] = b64charset[b];
+               
+               b = ((buf[i0] & 0x03) << 4) | (buf[i1] >> 4);
+               out[j++] = b64charset[b];
+               
+               b = ((buf[i1] & 0x0f) << 2) | ((buf[i2] & 0xc0) >> 6);
+               out[j++] = b64charset[b];
+               
+               b = buf[i2] & 0x3f;
+               out[j++] = b64charset[b];
+               
+               i0 += 3;
+               i1 = i0 + 1;
+               i2 = i1 + 1;
+       }
+       
+       if (i0 < len)
+       {
+               b = buf[i0] >> 2;
+               out[j++] = b64charset[b];
+               
+               b = (buf[i0] & 0x03) << 4;
+               
+               if (i1 < len) b |= (buf[i1] >> 4);
+               out[j++] = b64charset[b];
+               
+               if (i1 >= len)
+               {
+                       out[j++] = '=';
+                       out[j++] = '=';
+                       return out;
+               }
+               
+               b = (buf[i1] & 0x0f) << 2;
+               out[j++] = b64charset[b];
+               out[j++] = '=';
+       }
+       
+       return out;
+}
+
+static xpc_connection_t
+_create_aslmanager_connection(void)
+{
+       xpc_connection_t connection;
+
+       connection = xpc_connection_create_mach_service(ASLMANAGER_SERVICE_NAME, NULL, XPC_CONNECTION_MACH_SERVICE_PRIVILEGED);
+       xpc_connection_set_event_handler(connection, ^(xpc_object_t xobj) { if (xobj != NULL) {}; });
+       xpc_connection_resume(connection);
+
+       return connection;
+}
+
+int
+asl_trigger_aslmanager(void)
+{
+       xpc_connection_t connection = _create_aslmanager_connection();
+       if (connection == NULL) return -1;
+
+       xpc_object_t request = xpc_dictionary_create(NULL, NULL, 0);
+       if (request == NULL) return -1;
+
+       xpc_object_t reply = xpc_connection_send_message_with_reply_sync(connection, request);
+
+       if (reply != NULL) xpc_release(reply);
+       xpc_release(request);
+       xpc_release(connection);
+       return 0;
+}